Ariel showcased enough cleavage to boggle the mind in a jacket that was left gaping open.

The black number featured racy sheer sleeves and satin lapels.

Ariel's eye-popping assets took centre stage in the photo, which quickly revealed that the Modern Family star had neglected to wear a bra.

INSTAGRAM/ARIELWINTER

DANGEROUS CURVES: Ariel left her jacket wide open

Ariel – who has been dating actor Levi Meaden for a year – scraped her raven locks into a messy bun and added jewel-encrusted earrings.

In the makeup department, the actress rocked a pink blusher, winged eyeliner and a full nude pout.

However despite scrapping her bra for the scorching hot snap, the comments on Instagram were all about Ariel's face.

"She didn’t need the plastic surgery…," one of her 3.8 million followers commented.

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SURGERY ROW: Ariel's followers were convinced she'd had work done

Ariel Winter flaunts her body

American Actress Ariel Winter flaunts her curves in these super sexy images.

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Instagram

Ariel Winter's hottest pictures

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“Looks like she got lip filler, but it's her body and she looks good! Cleavage for days…”

Instagram user

Another asked: "What has happened to your gorgeous face? Slow down on the surgery girl, you're starting to look plastic."

And a third chimed in: "Looks like she got lip filler, but it's her body and she looks good! Cleavage for days…"

Ariel – who hasn't confirmed the lip filler rumours – has been a fan of going braless ever since her breast reduction surgery in 2015.

When she was 17 Ariel had her chest reduced from a 32F to a 32D after years of back and neck pain.

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Ellie Young/Instagram

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CONFIDENT: Ariel flashed scars from her breast reduction surgery last year

Ariel now feels confident with her reduced assets, even showing off her scars at the 2016 Screen Actors Guild Awards.

Ariel got hateful comments online about her willingness to flash her scars, but she has embraced them.

"I didn't think to cover them," she told Good Morning America soon after the ceremony.

"I didn't even think twice. It really astounded me when I was getting a lot of comments from people telling me to put my scars away and that they were gross. And I think that's just so ridiculous considering they're a part of me. They're not going away."